Underground void filling and ground stabilisation is often necessary to avoid disruption and to ensure safety against cavity collapse, as well as to avoid the risk of land subsidence.
The presence of abandoned underground voids of any origin, natural or artificial, is frequent in the subsoil of cities or in some specific geographical areas for historical or geological reasons, often due to the excavation of quarries in the proximity of or under buildings: it often constitutes a risk to the stability of structures and limits development projects and the possibilities of realisation for future buildings.
The filling of underground voids with Laterlite Expanded Clay is a tried and tested technique for their stabilisation and for making them safe: in fact, expanded clay (either loose or bound with cement), thanks to its high compressive strength, enables stresses on the ground to be redistributed throughout the subsoil, eliminating dangerous load concentrations and attenuating and redistributing them over time
As compared to filling with a traditional aggregate or grout, this significantly reduces the additional load and the lateral thrust, avoiding the risk of settlement.
Thanks to its high compressive strength in fact, expanded clay (either loose or bound with cement), enables stresses on the ground to be redistributed throughout the subsoil, eliminating dangerous load concentrations and attenuating and redistributing them over time.
This technique is also used for making safe disused underground tanks, by filling them with expanded clay and leaving them in place.
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